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Keep 2 Networks Seperate on an ASA 5505???

Hello, I'm new to Networking and Firewalls.  But I have what I hope is an easy question to answer.

1. I currently have a Comcast Business Class Gateway, Cisco 2100 Series WLAN Controller and a Cisco ASA 5505 all connected together to supply LAN and WLAN internet connections on my network.

2.  I also have a Card Access Security System on it owns network.  It currently does not have internet access.

I would like to put my security system on the internet so that I can support it remotely.  To do this, it has to be on a firewalled internet connection.

My question is;

Can  I put the two networks on my ASA 5505 and keep them seperate?  I don't want to provide a path into the Security System through my current LAN & WLAN.  But I do need a frewalled internet connection on my Security System.  I am trying to avoid purchasing a seperate firewall.

Thanks for any comments of feedback.

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Cisco Employee

Keep 2 Networks Seperate on an ASA 5505???


What license do you have on the ASA firewall? Basically by default you have 2 interfaces and a restricted DMZ, that would do it.

You can add a third interface with a security level of 100,  then Create a NAT translation and only allowed certain services/IPs to access then from the outside, something like this,

Interface vlan 3

ip address

nameif Security_System

security-level 100

Interface eth0/3

switchport access vlan 3

Then assigned an IP address to that system, create a NAT translation and an access list and that will do it.


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